Children who grow up in the foster care system often don’t learn some of the life skills commonly taught by a parent or a sibling. That includes knowledge about how to buy and maintain a car.

Becca Ziobro's arm is deep into the engine of her Nissan Sentra, which is pulled halfway into the garage of her Ramsey home. "Don't be afraid to step up, ladies," she said, and the group, which had ...